Public Enemies co-producer Bryan H. Carroll, who has made four pictures with Mann, says that the potential of HD as a creative medium has been clear to Mann and company since Ali.

Vimeo (vimeo.com) is a video-sharing site with playful, arty, HD content, supported by a friendly community of users, Kanye West, Lykke Li and Moby among them.

Zhou Tao:Blue and Red, 2014, single channel HDV, 16:9, color, with sound, 24 mins 25 secs, Courtesy of the artist & Vitamin Creative Space.